Domains API Update
When creating a new sending domain via the Domains API, the `smtp_login` field will not return a value as SMTP credentials are no longer generated automatically. To create SMTP credentials, use the Credentials endpoint or configure them in the UI under domain settings.
When creating a new sending domain via the Domains API, the `smtp_login` field will not return a value as SMTP credentials are no longer generated automatically. To create SMTP credentials, use the Credentials endpoint or configure them in the UI under domain settings.
